Pressurized containers



Oct. 19, 1965 F. w. BLANCHARD 3,212,673

PRESSURIZED CONTAINERS Filed Sept. 4, 1962 2 Sheets-Sheet 1 INVENTORFLOYD W. BLANCHARD F|G.8 BY ma AT TORNE Y Oct. 19, 1965 F, w. BLANCHARDPRESSURIZED CONTAINERS 2 Sheets-Sheet 2 Filed Sept. 4, 1962 INVENTOR.FLOYD W. BLANCHARD BY F 5 ATTORNEY FIG. I8

United States Patent 3,212,678 PRESSURIZED CONTAINERS Floyd W.Blanchard, 2334 Lorna Vista Place, Los Angeles, Calif. Filed Sept. 4,1962, Ser. No. 221,265 19 Claims. (Cl. 22295) This invention relates tothe art of dispensing materials from containers by a pressure fromwithin the container and more particularly to such containers which arepressurized by installing their closure caps.

Conventional pressurized, dispensing-type containers usually derivetheir pressure from a media which may be intermixed with the contents ofthe container as a liquid and which vaporizes to replace the pressurizedgas ejected during dispensing, thereby maintaining pressurization. Whilegenerally satisfactory, this type of dispensing container does havecertain draw backs. Certain articles to be dispensed from the containercannot be mixed with a dispensing gas, the container must be initiallycharged with a propelling fluid or gas and is not recharged in use andthe media employed to generate the gas is relatively expensive.

The various embodiments of the present invention, on the other hand,overcome these draw backs by employing air as the media, by providing,for those materials which cannot be mixed with air, positivedisplacementtype containers wherein air is injected into a portion ofthe container which is separated from the material to be dispensed by apiston, diaphragm, or collapsible liner, and by providing a containerwhich is recharged each time it is used by merely replacing its closurecap.

In view of the foregoing factors and conditions characteristic ofconventional dispensing devices of the type described, it is a primaryobject of the present invention to provide a new and useful dispensingdevice not subject to the disadvantages enumerated above and havingmeans especially designed for pressurizing the dispensing device aftereach use of the device.

Another object of the invention is to provide a con tainer having asingle chamber wherein a dispensing gas and a material to be dispensedare intermixed in a common chamber which is charged each time theclosure cap is placed on the container.

Yet another object of the invention is to provide a pressurized,material dispenser which may be pressurized with a dispensing gas byinstalling the cover on the dispenser and wherein the material to bedispensed is separated from the dispensing gas by a piston, diaphragm orcollapsible liner.

A further object of the invention is to provide an improved seal for apressurized, material dispenser.

A still further object of the invention is to provide a closure cap fora pressurized material dispenser which pressurizes the dispenser eachtime the cap is placed thereon.

Another object of the invention is to provide a pres surized materialdispenser which has a bellows-type closure member which may be squeezedto compress air and pressurize the dispenser each time it is placed onthe container.

Another object of the invention is to provide an improved valve for apressurized material dispenser.

Another object of the invention is to provide a pressurized, roll-ontype dispenser.

A still further object of the invention is to provide a pressurizedmaterial dispenser having a valve and brush combination in which thevalve is opened when the brush is applied to a surface and dispensesmaterial directly into the brush.

Another object of the invention is to provide a ball- I 3,212,678Patented Oct. 19, 1965 point pen which is pressurized each time the penis used.

These and other objects will appear upon reading the followingspecification and claims and upon considering in connection therewiththe attached drawings to which they relate.

Referring now to the drawings in which presently preferred embodimentsof the invention are illustrated:

FIGURE 1 is a longitudinal cross-sectional view of a first embodiment ofthe invention wherein a collapsible tube having a brush-type applicatoris housed within a casing which is pressurized each time a closure capis placed on the casing;

FIGURE 2 is a cross-sectional view, on an enlarged scale, of a detail ofconstruction of the device of FIG- URE 1 taken from the area enclosed incircle 2;

FIGURE 3 is a longitudinal, cross-sectional view of a second embodimentof the invention wherein a dispensing device is pressurized below apiston by admitting air at the bottom of the container each time theclosure cap is placed thereon;

FIGURE 4 is a cross-sectional view, on an enlarged scale, of a detail ofconstruction of the device of FIG- URE 3 taken from the area enclosed incircle 4;

FIGURE 5 is a longitudinal, cross-sectional view of a third embodimentof the invention wherein the closure cap pressurizes a dispensingcontainer below a piston by admitting air at the top of the container;

FIGURE 6 is a longitudinal, cross-sectional, partial view of a fourthembodiment of the invention wherein a valve is dislodged to dispensefluid from the container each time a brush-type applicator is applied toa surface to be painted;

FIGURE 7 is a cross-sectional view of a portion of the device of FIGURE6 showing the valve in its displaced position;

FIGURE 8 is a longitudinal, cross-sectional, partial view of a modifiedvalve and seal arrangement which may be employed with a pressurizedcontainer of the invention;

FIGURE 9 is a cross-sectional, partial view of a roll-on type dispenser;

FIGURE 10 is a cross-sectional view of a combined check valve anddispensing valve of the invention;

FIGURE 11 is a plan view taken in the direction of the arrows along line11-11 of FIGURE 10;

FIGURE 12 is a cross-sectional View of the valve of FIGURE 10 in itsoperative position;

FIGURE 13 is a plan view taken in the direction of the arrows along line1313 of FIGURE 12;

FIGURE 14 is a vertical, cross-sectional view, partly in elevation, of afifth embodiment of the invention wherein a table mounted holder isemployed which pressurizes a condiment dispenser each time it is placedtherein;

FIGURE 15 is a vertical, cross-sectional view of a modified tableholder;

FIGURE 16 is a vertical, cross-sectional view, partly in elevation,showing the table holder of FIGURE 15 in use;

FIGURE 17 is an enlarged cross-sectional view of av detail ofconstruction of the table holder of FIGURE 16 taken from the areaenclosed by the circle 17;

FIGURE 18 is a longitudinal, cross-sectional View of a ball-point pen ofthe invention;

FIGURE 19 is an enlarged sectional view of the tip of the combined checkvalve and dispensing valve of FIGURES 10-13;

FIGURE 20 is a sectional view of a modified form of the valve of FIGURE19; and

FIGURE 21 is a sectional view of another modification of the valve ofFIGURE 19.

Referring again to the drawings and more particularly to FIGURES 1 and2, the material dispenser constituting the first embodiment of thepresent invention, generally designated 10, includes an outer casing orhousing 12 in which is mounted a collapsible container 14 having aflexible, encompassing sidewall 15, a closed bottom wall 16 and anintegral resilient head portion -17. The head 17 includes a valve seat18, an outlet port 19, an inner, annular lip 20, and an outer annularlip 22 and a hollow, cylindrical tip portion 23. A dispensing valve 24includes a valve stem 25 and is mounted in the head 17 in such a mannerthat the valve 24 seats on the valve seat 18 and the valve stem 25 isgripped by the resilient head 17 to retain the valve 24 in positionagainst the valve seat 18. An applicating brush 26 is secured within thecylindrical tip portion 23 by means of a band 27. The outer, annular lip22 extends beyond the outer casing 12 and includes an air inlet port 28.The head 17 is secured in position in the casing 12 by means of aninturned flange 29 at the upper end of the casing.

An impervious closure cap 30 has an annular groove 31 on its inner wallat its midsection and pressurizes the casing 12 when it is slid intoposition thereon. The closure cap 30 is shown only partially on and ifhigh pressure is desired may be of sufiicient length to encase the fulllength of the container 12. The outer, annular lip 22 serves as a sealcompressing air within the cap as it is slipped down over the casing 12.The pressurized air enters the air inlet port 28 and depresses theinner, annular lip 20, as shown in FIGURE 2, permitting air to flowbetween the walls of the casing 12 and the liner '14, therebypressurizing the casing -12 and compressing the collapsible container 14about any material which may be stored therein. The inner annular lipserves as a check valve permitting the air to enter but preventing itfrom flowing from the casing 12. The closure cap 30 is retained inposition on the casing 12 by the outer, annular lip 22 which engages theannular groove 31. The annular groove 31 may also be sized with respectto the lip 22 so as to permit .air trapped in the cap to flow out aroundthe annular lip 22 thereby depressurizing the cap in the closedposition. When the cap 30 is installed, the outer, annular lip 22 servesas a wiper cleaning the inner wall of the cap 30 of any materialdeposited thereon by the brush 26.

Material may be dispensed from the collapsible container 14 by removingthe cap 30 and applying the brush 26 to a surface to be painted. Thisdistorts the outlet port 19 so that it relaxes its grip on the valvestem displacing the valve 24 from its valve seat 18 so that the materialwill flow from the container 14 through the outlet port 19 and thecylindrical tip portion 23 into the brush 26. The casing :12 ispressurized again when the cap is replaced after each use of the brush26.

Referring now to FIGURES 3 and 4, a material dispenser 35 comprising thesecond embodiment of the invention includes a cylindrical container 36having an encompassing sidewall 37, a closed bottom 38 and an open topwith an inturned flange 39. A flexible, flaptype check valve 40 ismounted in the bottom of the container 36 adjacent an air inlet port 41,which, in turn, is mounted in the sidewall 37. A flexible, materialdispensing head 42 which includes an inner, annular lip 43, valve seat44, a discharge port 45, and an outer, annular lip 46, is mounted in theopen top of container 36 and its retained in position by the flange 39.A valve 47 includes a stem 48 which is mounted in the discharge port 45in such a manner that the valve 47 seats on the valve seat 44. The stem48 frictionally engages the inner wall of the port 45 to retain thevalve 47 against its seat 44. A brush-type applicator 49 is identical tothe brush 26 shown in FIGURE 1 and will not be further described. Arigid piston 50 is slidably mounted inside the container 36 above theair inlet port 41 and seals the space below the piston from the spaceabove so that air entering port 4 41 will not mix with material storedin container 36 above the piston 50.

A closure cap 51 has an encompassing sidewall 52, a closed bottom 53 andan open top 54. An annular collar 55 includes an annular channel 56 andis an integral part of the open top 54. A resilient sealing ring 57 ismounted in the channel 56. When the cap 51 is slid over the container36, the sealing ring 57 is compressed and prevents air from escapingfrom within the cap 51. Compressed air from within the cap 51 isreleased into the container 36 through the air inlet port 41 when theresilient seal 57 passes thereby. The air pressure is sufiicient to(118- place the check valve 40, as shown in FIGURE 4, permitting air toflow into the container 36 below the piston 50. The compressed air willpressurize the container 36 below the piston 50 causing it to moveupwardly within the container 36 against the material to be dispensed,therefrom. Material is dispensed from the container 36 by removing thecap 51 and exerting a thrust on the s de of the brush 49 therebydistorting the Walls of the d1s= charge port 45 so that the valve 47 isunseated.

Referring now to FIGURE 5, a material dispenser 60 comprises the thirdembodiment of the invention and includes an outer cylindrical container61 having an encompassing sidewall 62, a closed bottom 63 and aninturned, annular flange 64. A resilient, material dispensing head 65has an inner, annular lip 66 engaging one side of the flange 64 and anouter, annular lip 67 engaging the other side of the flange 64. Atubular member 68 depends from the dispensing head 65 into the container61 and includes an open bottom 69 which is disposed superjacent thebottom wall 63. A rigid piston 70 is slidably mounted in the tubularmember 68 near the bottom thereof. Material to be dispensed from thetubular member 68 may be stored in the tubular member 68 above thepiston 70. Piston 70 fits Within tubular member 68 with an air tightseal to prevent intermixing of air with material stored above thepiston.

The material dispensing head 65 also includes a valve seat 71, amaterial outlet port 72, a hollow, cylindrical tip portion 73 and an airinlet port 74. A valve 75 includes a valve stem 76 which is frictionallymounted in the material outlet port 72 in such a manner that the valve75 seats on the valve seat 71. An applicator brush 78 is mounted in thehollow tip portion 73 in the same manner as the brush 26 in FIGURE 1.

A closure cap 79 includes an annular groove 80 at its mid-portion andpressurizes the container 61 below the piston 70 whenever it is put onthe container 61 by means of the outer, annular lip 67 engaging theinner Wall of the closure cap 79 and compressing air therein which flowsunder pressure through the air inlet port 74 into the container 61,between the encompassing sidewall 62 of the container 61 and theencompassing sidewall 81 of the tubular member 68, and into the open end69 below the piston 70.

Referring now to FIGURES 6 and 7, the fourth embodiment of the inventionconstitutes a special applicator 85 which is designed for use withfingernail polish and other materials having a solvent which adverselyaffects resilient dispensing heads of the type employed in the otherembodiments of the invention. A solvent resistant head, on the otherhand, is too rigid to become deformed by a side thrust on the brush;therefore, a special dispensing valve is employed. The applicator 85includes a cylindrical container 86 having an encompassing sidewall 87,a closed bottom 88 and an open end with an inturned flange 89. Adispensing head 90 includes an inner, annular collar 91 having ashoulder 92 which engages the flange 89 and an outer, annular lip 93which is of greater diameter than the container 86 and which alsoengages the flange 89 to retain the head 90 in position in the open endof the container 86. The dispensing head 98 also includes an air inletport 94 which is covered by an annular, flapper-type valve 95. The valve95 also serves as a seat 96 for a valve 97 having a valve stem 98. Thedispensing head 90 also includes a cylindrical tip portion 90:: having ahollow, outer end portion 99a and an inner, outlet passageway 99 inwhich the stem 98 is mounted. The valve 97 is retained in a seatedposition by means of a disc 100 which is rigidly affixed to the valvestem 98 in such a manner that it engages the outer end of the outletpassageway 99. A shaft 101 is mounted on the end of the valve stem 98and extends beyond the hollow, outer end portion 99a. A hollow brush 102encompasses the shaft 101 and is aflixed to the inner wall of the endportion 99a by means of a collar 103.

A cylindrical closure cap 105 includes an internally threaded portion106 adapted to engage external threads 107 on the container 86. Theclosure cap 105 has a slightly smaller inside diameter than the diameterof the annular lip 93 so that the lip 93 forms a seal preventing airfrom escaping from the cap 105 when it is slid over the lip 93. Thus,pressure builds up Within the cap 105 and flows through the air inletport 94 into the container 86. The flap valve 95 serves as a check valveto prevent air from flowing out of the container 86 through the airinlet port 94.

In use, the cap 105 is removed from the container 86 and the brush 102is applied to a surface to be painted in such a manner that the shaft101 also contacts the surface to be painted and tips the valve 97 offits valve seat 96, permitting material to flow from the container 86through the passageway 99 and into the brush 102.

Referring now to FIGURE 8, a modified valving and sealing arrangement isshown wherein a resilient ring 110 encompasses a cylindrical container111 and prevents air from flowing out the open end of a closure cap 112when it is slid onto the container 111. The container 111 includes aclosed bottom wall 113 and an apertured head portion 114. An annularvalve seat 115 of resilient material is mounted inside the head portion114 and includes an aperture 116 which accommodates the valve stem 117of a dispensing valve 118. The dispensing valve 118 has a fluidconducting passageway 119 bored into the stem 117 which communicateswith an aperture 120 adjacent the valve head 121. A compression spring122 encompasses the valve stem 117 and has one end seated in a springseat 123 in the head portion 114. The other end of the spring 122 bearsagainst a ring 124 holding a brush 125 onto the valve stem 117. The biasof the spring 122 is such that air pressure building up within the cap112 as it is placed on the container 111 unseats the valve 118permitting air to flow through the fluid conducting passageway 119, outthe aperture 120 and into the container 111. When it is desirable toprevent air entering the fluid conducting passageway 119 the bias of thespring is increased so that the air pressure building up in the cap doesnot unseat the valve 118 but, acting on the larger area of the annularvalve seat 115, moves it away from the head portion 114 permitting airto flow between the valve stem 117 and the head portion 114 then betweenthe valve seat 115 and the head portion 114 into the container 111. Whenthe cap 112 is removed, material may be dispensed from the container 111by tipping the valve oh: its seat 115 by exerting a sideward thrust onthe valve stem 117. Material within the container 111 will then flow outthrough the aperture 120, the fluid conducting passageway 119 and thebrush 125.

Although brushes have been shown on the discharge end of all of theembodiments of the invention shown in FIGURES l-8 for purposes ofillustration, but not of limitation, it will be readily understood bythose skilled in the art that dispensing nozzles of various types may beused in place of the brushes.

Referring now to FIGURE 9, a roll-on type dispenser 130 is shown whereina cylindrical container 131 has an encompassing sidewall7132, a closedbottom 133 and an open top with an inturned flange 134. An applicatorhead 135 includes an annular collar 136 having a shoulder 137 whichengages the inturned flange 134 and an outer, an-

6 nular lip 138 which is of larger diameter than the con tainer 131. Theapplicator head also includes a socket 139 in which a ball 140 isloosely mounted. The socket 139 includes a valve seat 141 against whichthe ball 140 seats from pressure within the container 131. The socket139 also includes radial grooves 142 which communicate with fluid outletports 143. When a closure cap, which may be identical with the closurecap 30 shown in FIG- URE 8, is placed on the container 131, the outer,annular lip 138 engages the sidewalls of the closure cap compressing airtherein. Air under pressure then unseats the ball 140 permitting air toflow in between the valve seat 141 and the ball 140, along the radialgrooves 142, through the ports 143 and into the container 131pressurizing it.

In use, the ball 140 is unseated by applying it to the surface to betreated with the material from within the container 131. Assuming thecontainer 131 to be pressurized, the material from within the containerwill flow under pressure out through the outlet ports 143, and along theradial grooves 142, thereby applying material to the lower surface ofthe ball 140. As the ball 140 is rolled along a surface to be treated,the material from the lower surface of the ball will come in contactwith the surface to be treated.

Referring now to FIGURES 10-13, a combination check valve and dispensingvalve 145 is shown. A container 146, which may be identical with any ofthe containers of the other embodiments of the invention, includes aninturned flange 147. A dispensing head 148 is mounted in the flanged endof the container 146 and includes an annular collar 149 having ashoulder 150 which engages the under surface of the annular flange 147.The head 148 also includes an outer, annular lip 151 which engages theouter rim of the container 146. The dispensing head 148 is made of aresilient material and the combination discharge orifice and check valve145 is formed in the end of the dispensing head 148 by cutting one ormore slits 152 therein, as shown in FIGURE 11. When a closure cap, notshown, but which may be similar to the closure cap shown in FIGURE 6, isplaced on the container 146, the outer, annular lip 151 will engage theinner surface of the cap, pressurizing the cap and air under pressurewill deform the resilient slits 152 permitting air to flow underpressure into the container 146. When it is desired to dispense materialfrom the container 146, the dispensing head 148 may be deflected with asideward thrust thereby deforming the slits 152 creating a dischargeorifice in the end of the discharge head 148, as shown in FIGURES 12 and13. A thrust at any point on the dispensing head 148 will deform atleast one of the slits 152. If a single slit is used, the dispensinghead should be deflected at an end point of the slit in order to createa discharge orifice.

The valve action of the slits, when subjected to a pressure differentialacross the wall of the dispensing head, is due to the configuration ofthe wall pierced by the slits. FIGURE 19 is an enlarged section of thetip of the combined check valve and dispensing valve 145 of FIGURES10-13 in which the slits 152 pierce the wall on the apex of an inwardlyprojecting cone 188. When a higher pressure is external to thedispensing head 148, it acts on the concave surface of the cone 188 toopen the slits 152. When a higher pressure is internal to the dispensinghead 148 it acts on the convex surface of the cone 188 to squeeze theopposing lips of the slits 152 together to form a positive pressuretight seal. FIGURE 20 illustrates an alternate design of a dispenser145a in which the cone 188 of FIGURE 19 is replaced by an inwardlyprojecting cylindrical passage 190 which may also receive the shank endof a brush, not shown, to form a brush applicator. Pressure on theoutside of the dispenser 145a opens the slits 152b and pressure on theouter perimeter of the cylindrical passage 190 inside the container 146closes the slits 15217. FIGURE 21 illustrates another alternate designin which the slits 15% are closed by a pressure differential in eitherdirection across the dispenser head walls 191.

When a higher pressure is external to the dispensing head it actsagainst the walls 191 to squeeze the slits 152b closed, despite thesmall force tending to open the slits 152b resulting from the externalpressure acting on the shallow flow passage 192. When a higher pressureis internal to the dispensing head 145b, it acts on the solid projectingpart 193 to squeeze the slits 152k closed.

Referring now to FIGURE 14, a table mounted dispenser 160 is shown andthis embodiment of the invention may be employed for dispensingcondiments such as catchup and the like. The dispenser 160 includes acontainer 161 having a dispensing head 162 of the type shown in FIGURES1013. The dispenser 168 is mounted in a stand 163 which may be placed ona counter or a table. The stand 163 includes a base portion 164, anupstanding, cylindrical sidewall 165 and a closure cap portion 166. Theportion 166 corresponds in size and shape to the neck 167 of thecontainer 161. When the container 161 is placed into the holder 163, therim of the dispensing head 162 will contact the sidewalls of the closurecap portion 166 whereby air will be compressed and flow under pressureinto the container 161 through the dispensing head 162. Material may bedispensed from the container 161 by distorting the head 162 in themanner shown in FIGURES 12 and 13 for the head 148. It is desirable thatthe stand 163 have sufficient weight to prevent it from being liftedfrom the table as the container 161 is withdrawn.

Referring now to FIGURES 15 through 17, a modified table-type dispenser170 is shown wherein the holder 171 includes a bellows-type bulb 172. Acontainer 173 having a discharge head 174, which may be identical withthe discharge head shown in FIGURES 10-13 is adapted to engage thebellows 172 when the container 173 is inserted into the holder 171 anddepresses the bellows 172 sufficiently to pump air into the container173 through the discharge head 174. A resilient ring 175 is mounted atthe upper end of the bellows 172 and engages the outer surface of thecontainer 173 to form an air seal 50 that air will be trapped within thebellows 172 when the container 173 is inserted thereinto. Air flowsthrough the head 174, into the container 173 which may be retained inposition in the holder 171 against the pressure exerted by the bellows172 by means of a bracket 176, which may be an integral part of theholder 171.

Referring now .to FIGURE 18, a ballpoint pen is shown having aconventional ballpoint pen refill cartridge 181 which may be filled withink. The cartridge 181 is mounted in a casing 182 having an air inletaperture 183 at its end remote from the writing end of the pen. The pen180 also includes a cap member 184 which is adapted to cover the pointof the pen when the pen is not in use and which may be placed on theapertured end of the pen, as shown. The cap 184 includes a sealingmember 185 comprising a resilient ring which engages the sidewalls ofthe casing 182 and compresses air within the cap 184 which flows throughthe aperture 183 into the ballpoint pen 181. The pen will remainpressurized only as long as the cap 184 remains in place on theapertured end. The cap 184 is maintained in position on the aperturedend of the pen against the force of the compressed air by means of aninturned flange 185 on the cap 184 which engages an annular groove 186on the casing 182, The casing 182 is tapered, as shown, to prevent theinjection of air into the cartridge 181 when the cap 184 is placed onthe point-end of casing 182. It is desirable that the cartridge 181 fitthe casing 182 with suflicient closeness at 187 to ,form a sealtherebetween.

While the particular embodiments of the invention herein shown anddescribed in detail are fully capable of attaining the objects andproviding the advantages hereinbefore stated, it is to be understoodthat they are merely illustrative of the presently preferred embodimentsof the invention and that no limitations are intended to the details ofconstruction, or design herein shown other than as defined in theappended claims.

I claim:

1. A self-pressurizing material dispenser comprising:

a container adapted to store a material under pressure;

flow passage means in communication with said container for controllingthe flow of said material from said container and controlling the flowof pressurizing gas into said container, said flow passage meansincluding a normally closed element for preventing flow of said materialfrom said container when it is pressurized and another element forcontrolling the flow of said pressurizing gas into said container; and

a closure member for said container, said closure member being adaptedto inject said pressurizing gas into said container through said anotherelement of said flow passage means as said closure member is beingplaced in an effectively gas tight assembled relation with saidcontainer, said pressurizing gas pressurizing said material so that thematerial will flow from said container through said normally closedelement of said flow passage means when said normally closed element isopened.

2. The dispenser of claim 1 wherein said flow passage means comprises:

a cylindrical body portion;

a conical nose portion; and

a slit-type aperture mounted in said nose portion.

3. The dispenser of claim 1 wherein said flow passage means comprises:

a material dispensing head mounted on said container and having a valvedpassageway communicating with the material to be dispensed;

a brush connected to said dispensing head, said brush including amaterial discharge port communicating with said valved passageway; and

a flap-type check valve in communication with said container.

4. The dispenser of claim 1 wherein said flow passage means comprises:

a material dispensing head mounted on said container and having a ballsocket communicating with the material to be dispensed, said ball socketincluding an annular valve seat;

a ball loosely mounted in said ball socket in such a manner that saidball seats against said valve seat when said container is pressurized;and

a gas inlet aperture provided in said dispensing head subjacent saidball for admitting said pressurizing gas when said ball is unseated byplacing said closure member in assembled relation with said container.

5. The dispenser of claim 1 wherein said closure member comprises:

a closure cap adapted to compress air and admit it into said containeras said cap is slid onto said container.

6. The dispenser of claim 1 wherein said closure member comprises:

a container supporting member adapted to have air compressed thereinwhen said container is assembled with said supporting member.

7. A self-pressurizing material dispenser comprising:

an outer casing having an encompassing sidewall, a closed bottom, and anopen top including an annular inturned flange;

an inner, collapsible container mounted in said outer casing and havingan encompassing sidewall, a closed bottom and an open top;

a material dispensing head including an inner, annular hp engaging theunder surface of said inturned flange, and an outer, annular lipengaging the outer surface of said inturned flange, an annular valveseat, and a material discharge orifice, said dispensing head beingconnected to the open end of said inner collapsible container in such amanner that said discharge orifice is in fluid communication With theinterior of said container;

an air inlet port mounted in said outer, annular lip superjacent saidflange; and

a cylindrical closure cap for said casing, said closure cap having aninside diameter slightly smaller than the diameter of said outer,annular lip and including a means for retaining said cap in position onsaid casing after it has been slid thereon, said outer, annular lippreventing escape of air from said cap as it is slid onto said casing,whereby compressed air flows from said cap through said air inlet portto depress said inner annular lip and flow into said casing topressurize the outer wall of said collapsible container.

8. A self-pressurizing material dispenser comprising:

a cylindrical container having an encompassing sidewall, an imperviousbottom wall, and a flanged open p;

an air inlet port mounted in said sidewall adjacent said bottom wall;

a check valve mounted in said container in such a manner that it coverssaid air inlet port and permits air to flow into said container whilepreventing air from flowing from said container out through said port;

a piston mounted in said container above said air inlet port;

a valved, material dispensing head mounted in the flanged end of saidcontainer;

an open topped closure cap for said container having an encompassingsidewall, and a closed bottom; and

a resilient sealing ring mounted in said closure cap adjacent its openend, said closure cap being adapted to inject compressed air into saidcontainer through said air inlet port when said cap is placed on saidcontainer.

9. A self-pressurizing, material dispenser comprising:

a cylindrical casing having an encompassing sidewall,

a closed bottom and a flanged, open top;

a valved material dispensing head mounted in said open top, said headincluding an air inlet port and a material outlet port;

a tubular member mounted in said casing in spaced relation with thesidewall of said container and in fluid communication with said materialoutlet port;

a piston slidably mounted in said tubular member; and

a closure cap adapted to pressurize said container below said piston byadmitting air through said air inlet port when said closure cap is slidonto said container.

10. The dispenser of claim 1 wherein said flow passage means comprises:

a material dispensing head mounted on said container,

said material dispensing head including a fluid discharge passageway incommunication with said container, a valve having a valve stem mountedin said passageway and controlling flow of fluid through saidpassageway, and a brush encompassing at least a portion of said valvestem and including a fluid discharge aperture in fluid communicationwith said passageway, said valve stem extending into said brush asuflicient distance that said stem is displaced when said brush isapplied to a hard surface in use; and said another element comprising aflap-type check valve in communication with said container for admittingsaid pressurizing gas to said container.

11. A self-pressurizing material dispenser comprising:

a container adapted to store a material under pressure;

gas inlet means mounted on said container to admit a gas under pressureto pressurize said material;

a dispensing valve mounted on said container for controlling thedischarge of said material therefrom, said valve being normally closedto prevent material from flowing from said container when it ispressurized; and

a closure member for said container, said closure member being adaptedto inject said gas under pressure 16 into said container through saidgas inlet means as said closure member is being placed in an effectivelygas tight assembled relation with said container.

12. A self-pressurizing material dispenser comprising:

a container adapted to store a material to be dispensed;

gas inlet means mounted on said container to admit a gas under pressureinto said container and prevent flow of gas from said container;

a dispensing valve mounted on said container for controlling thedischarge of said material therefrom;

a piston slidably mounted in said container intermediate said gas inletmeans and said dispensing valve; and

a closure member adapted to pressurize said container through said gasinlet means when assembled to said container.

13. The dispenser of claim 11 including also an impervious collapsiblebag mounted in said container for storing said material, said gas inletmeans being in fluid communication with one side of said bag and saiddispensing valve being in fluid communication with the other side ofsaid bag, said bag being collapsed by gas pressure to discharge saidmaterial from said bag when said valve is opened.

14. The dispenser of claim 11 including also means mounted in saidcontainer for dividing it into first and second chambers, said gas inletmeans being in fluid communication with one chamber and said dispensingvalve being in fluid communication with the other chamber.

15. The dispenser of claim 11 wherein said dispensing valve and said gasinlet means comprises a single, dual purpose valve.

16. The dispenser of claim 11 wherein said gas inlet means comprises aflap-type valve mounted inside said container.

17. A pressurized material dispenser comprising:

a pressurizable container having an open top;

a cap for said container to cover said open top;

a valve seat mounted in said open top;

a valve assembly having a valve and a hollow valve stem, said valveassembly being mounted in said open top in such a manner that said valveseats on said seat inside said container and said valve stem extendsthrough said open top to the outside of said container;

a compression spring connected to said valve stem and said container insuch a manner that said valve is biased into seating relation with saidseat;

port means placing said hollow valve stem in communication with saidcontainer intermediate said valve and said seat; and

a brush connected to said valve stem outside said container, said brushbeing in communication with said container through said valve stem, saidcontainer being pressurized with air through said valve assembly whensaid cap is slid onto said container over said valve assembly.

18. A self-pressurizing ballpoint pen comprising:

a casing having an open end; orifice means provided in said casing foradmitting a pressurizing gas into said casing;

a ballpoint pen member mounted in said casing, said member having awriting element at one end and an opening at the other end, said writingelement extending out through said open end of said casing in sealedrelation therewith, said open end of said member being in fluidcommunication with said orifice means; and

cap means for covering said writing element when said pen is not in useand for injecting said pressurizing gas into said casing through saidorifice means when said cap means is placed in an effectively gas tightassembled relation with said casing, whereby said gas will pressurizesaid ballpoint pen member.

19. A self-pressurizing material dispenser comprising:

a container adapted to store a material under pressure;

flow passagemeans in communication with said container for controllingthe flow of said material from said container and controlling the flowof pressurizing gas into said container, said flow passage meansincluding inlet means for controlling the flow of pressurizing gas intosaid container to pressurize said material and normally closed outletmeans for controlling the fiow of said material out of said container;and

:a closure member for said container, said closure member being adaptedto inject said pressurizing gas into said container through said inletmeans of said flow passage means as said closure member is being placedin an effectively gas tight assembled relation With said container, saidpressurizing gas pressurizing said material so that the material willflow from said container through said outlet means of said flow passagemeans when said normally closed outlet means is opened.

References Cited by the Examiner UNITED STATES PATENTS Hartman 222-575 XWest et al. 222-193 Nagely 15-581 Lesquendieu 222-95 Cimbura et al222-193 Catlin 137-525.1 St. Germain.

Seymour 222-569 X Altseimer 222-389 RotWein 137-5253 X Fillmore 15-572Canada.

LOUIS J. DEMBO, Primary Examiner. LAVERNE D. GEIGER, EVERETT W. KIRBY,

Examiners.

1. A SELF-PRESSURIZING MATERIAL DISPENSER COMPRISING: A CONTAINERADAPTED TO STORE A MATERIAL UNDER PRESSURE; FLOW PASSAGE MEANS INCOMMUNICATION WITH SAID CONTAINER FOR CONTROLLING THE FLOW OF SAIDMATERIAL FROM SAID CONTAINER AND CONTROLLING THE FLOW OF PRESSURIZINGGAS INTO SAID CONTAINER, SAID FLOW PASSAGE MEANS INCLUDING A NORMALLYCLOSED ELEMENT FOR PREVENTING FLOW OF SAID MATERIAL FROM SAID CONTAINERWHEN IT IS PRESSURIZED AND ANOTHER ELEMENT FOR CONTROLLING THE FLOW OFSAID PRESSURIZING GAS INTO SAID CONTAINER; AND A CLOSURE MEMBER FOR SAIDCONTAINER, SAID CLOSURE MEMBER BEING ADAPTED TO INJECT SAID PRESSURIZINGGAS INTO SAID CONTAINER THROUGH SAID ANOTHER ELEMENT OF SAID FLOWPASSAGE MEANS AS SAID CLOSURE MEMBER IS BEING PLACED IN AN EFFECTIVELYGAS TIGHT ASSEMBLED RELATION WITH SAID CONTAINER, SAID PRESSURIZING GASPRESSURIZING SAID MATERIAL SO THAT THE MATERIAL WILL FLOW FROM SAIDCONTAINER THROUGH SAID NORMALLY CLOSED ELEMENT OF SAID FLOW PASSAGEMEANS WHEN SAID NORMALLY CLOSED ELEMENT IS OPENED.